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25 years of field exposure of pre-cracked concrete beams; combined impact of spacers and cracks on reinforcement corrosion

Geiker, Mette ; Danner, Tobias ; Michel, Alexander ; Belda Revert, Andres ; Linderoth, Oskar LU orcid and Hornbostel, Karla (2021) In Construction and Building Materials 286.
Abstract

The state of corrosion of three pre-cracked concrete beams was investigated after 25 years of marine exposure (atmospheric, tidal and submerged). The influence of inadequate plastic spacers was found to overrule the possible impact of bending cracks on reinforcement corrosion. Increased chloride ingress was detected in cracked areas, but very little corrosion was observed where cracks reached the reinforcement. Also, high chloride content was measured in uncracked parts of the beams, but no or very limited corrosion was observed outside spacers and a few cracks. It is hypothesised that corrosion, initiated early at weak spots (here at plastic spacers) can protect the remaining reinforcement from corrosion.

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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cracks, Long-term marine exposure, Reinforced concrete, Reinforcement corrosion, Spacers
in
Construction and Building Materials
volume
286
article number
122801
publisher
Elsevier
external identifiers
  • scopus:85102558366
ISSN
0950-0618
DOI
10.1016/j.conbuildmat.2021.122801
language
English
LU publication?
yes
id
8355b947-e800-407c-81b6-c92bea0957be
date added to LUP
2021-03-23 09:18:48
date last changed
2022-04-27 00:53:57
@article{8355b947-e800-407c-81b6-c92bea0957be,
  abstract     = {{<p>The state of corrosion of three pre-cracked concrete beams was investigated after 25 years of marine exposure (atmospheric, tidal and submerged). The influence of inadequate plastic spacers was found to overrule the possible impact of bending cracks on reinforcement corrosion. Increased chloride ingress was detected in cracked areas, but very little corrosion was observed where cracks reached the reinforcement. Also, high chloride content was measured in uncracked parts of the beams, but no or very limited corrosion was observed outside spacers and a few cracks. It is hypothesised that corrosion, initiated early at weak spots (here at plastic spacers) can protect the remaining reinforcement from corrosion.</p>}},
  author       = {{Geiker, Mette and Danner, Tobias and Michel, Alexander and Belda Revert, Andres and Linderoth, Oskar and Hornbostel, Karla}},
  issn         = {{0950-0618}},
  keywords     = {{Cracks; Long-term marine exposure; Reinforced concrete; Reinforcement corrosion; Spacers}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Construction and Building Materials}},
  title        = {{25 years of field exposure of pre-cracked concrete beams; combined impact of spacers and cracks on reinforcement corrosion}},
  url          = {{http://dx.doi.org/10.1016/j.conbuildmat.2021.122801}},
  doi          = {{10.1016/j.conbuildmat.2021.122801}},
  volume       = {{286}},
  year         = {{2021}},
}